Convert Pound-force feet to Gram-force millimetres
Convert Pound-force feet (lbf·ft) to Gram-force millimetres (gf·mm) instantly and accurately.
Conversion Formula
gf·mm = lbf·ft × 138254.9544
About Pound-force feet
The pound-force foot (lbf·ft) equals ≈ 1.35582 N·m, the dominant torque unit in North American automotive and mechanical engineering. SAE engine performance tests, US vehicle lug-nut torque specs (80-100 lbf·ft), and American industrial gearbox catalogs all use lbf·ft. V8 truck engines produce 400-600 lbf·ft; diesel pickups exceed 900 lbf·ft. 1 lbf·ft ≈ 1.35582 N·m = 12 lbf·in ≈ 192 ozf·in.
About Gram-force millimetres
The gram-force millimetre (gf·mm) equals 9.80665 × 10⁻⁶ N·m, the natural unit for precision micro-mechanisms. Swiss watchmaking datasheets list hairspring and balance-wheel detent torques in gf·mm; micro-servo holding torques, precision force gauge spring calibration, and miniature dental handpiece torque limits also fall in this range. A typical watch hairspring torque is 0.1-5 gf·mm. 1 gf·mm = 9.80665 × 10⁻⁶ N·m = 100 dyn·cm = 0.1 gf·cm.
Quick Reference Table
| Pound-force feet (lbf·ft) | Gram-force millimetres (gf·mm) |
|---|---|
| 1 lbf·ft | 138255 gf·mm |
| 2 lbf·ft | 276510 gf·mm |
| 5 lbf·ft | 691275 gf·mm |
| 10 lbf·ft | 1382550 gf·mm |
| 25 lbf·ft | 3456370 gf·mm |
| 50 lbf·ft | 6912750 gf·mm |
| 100 lbf·ft | 13825500 gf·mm |